EP2716968A1 - Beleuchtungsvorrichtung - Google Patents

Beleuchtungsvorrichtung Download PDF

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Publication number
EP2716968A1
EP2716968A1 EP12792328.2A EP12792328A EP2716968A1 EP 2716968 A1 EP2716968 A1 EP 2716968A1 EP 12792328 A EP12792328 A EP 12792328A EP 2716968 A1 EP2716968 A1 EP 2716968A1
Authority
EP
European Patent Office
Prior art keywords
led circuit
main body
circuit board
lighting device
device main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12792328.2A
Other languages
English (en)
French (fr)
Other versions
EP2716968A4 (de
EP2716968B1 (de
Inventor
Yuji Nakagawa
Tomohiro IKAWA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Publication of EP2716968A1 publication Critical patent/EP2716968A1/de
Publication of EP2716968A4 publication Critical patent/EP2716968A4/de
Application granted granted Critical
Publication of EP2716968B1 publication Critical patent/EP2716968B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/004—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by deformation of parts or snap action mountings, e.g. using clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting device which is applied to, for example, a downlight installed into a storing hole opened in a ceiling material.
  • a lighting device which includes a device main body which accommodate therein a mounting plate, a terminal block and a connector, wherein a light source block including an LED circuit board and a lens element which serves as an optical member, a lighting controller and a heat conducting sheet are mounted on the mounting plate (for example, refer to Patent Document 1).
  • Patent Document 1 in a state in which a surface of the LED circuit board on which LEDs are mounted is oriented downward the LED circuit board is brought into contact with a lower surface portion of the mounting plate via the heat conducting sheet, and the lens element is disposed on the lower surface portion of the mounting plate so as to accommodate the LED circuit board in an accommodating portion of the lens element such that the LEDs correspond to respective recess portions of the lens element.
  • the lens element is mounted on the mounting plate by inserting screws through cutouts formed in projecting pieces of the lens element via a spacer and a packing, and screwing the screws into a pair of screw holes formed in the mounting plate so as to correspond to the screws.
  • Patent Document 1 JP-A-2006-172895 ( Fig. 3 , paragraphs 0035, 0036)
  • Patent Document 1 a lighting device is proposed, in which an LED circuit board and a reflection plate serving as an optical member are mounted in a device main body.
  • the LED circuit board is screwed directly to the device main body with the screws.
  • the related-art lighting device cannot provide a good assembling performance.
  • Patent Document 1 a lighting device is proposed, in which an LED circuit board is supported by a resin reflection plate.
  • the invention has been made with a view to solving the above-described problem, and an object thereof is to provide a lighting device which can provide a good assembling performance, which is advantageous in cost and which can deal with LEDs of higher outputs.
  • a lighting device of the invention includes: a device main body; an LED unit which is mounted on a bottom surface of the device main body and which includes a plurality of LEDs which are mounted on a plurality of LED circuit boards; an optical member which is mounted on the device main body on a front side of the LED unit; and an LED circuit board pressing spring which supports the LED circuit boards in the device main body.
  • the LED circuit board pressing spring presses the plurality of LED circuit boards such that LED circuit boards adjacent to each other are pressed together.
  • the optical member includes a projecting portion which presses the LED circuit board pressing spring.
  • the LED circuit board pressing spring has integrally a function to support the LED circuit boards in the device main body and a function to press the plurality of LED circuit boards such that LED circuit boards adjacent to each other are pressed together.
  • the lighting device of the invention further includes a pressing plate which presses the optical member to the device main body.
  • the LED circuit board pressing spring includes a plurality of LED circuit board pressing portions which press the plurality of LED circuit boards.
  • the lighting device according to the invention is advantageous in providing the good assembling performance, providing better cost, and dealing with LEDs of higher outputs.
  • a lighting device 10 includes a device main body 11 and a frame member 12 which is mounted underneath the device main body 11 and is installed into a storing hole opened in a ceiling material, not shown, for application to a downlight.
  • the device main body 11 is made of metal such as die-cast aluminum and has a substantially circular cylindrical portion 13, having a plurality of heat dissipating fins 14 on an upper portion of the cylindrical portion 13.
  • the frame member 12 has a cylindrical portion 15 which is formed of, for example, a hard resin material and a flange-shaped decorative plate 16 at a lower end portion of the cylindrical portion 15, and a plurality of mounting springs 17 are attached to a side portion of the cylindrical portion 15.
  • an LED unit 18 is mounted in a bottom portion of the device main body 11.
  • a plurality of LED chips 19 are sealed up on corresponding LED circuit boards 20, and printed circuits, not shown, provided on the LED circuit boards 20 are electrically connected to a power supply unit 22 through a device wiring 21.
  • the power supply unit 22 is accommodated in a power supply case 23, and the power supply case 23 is screwed to the upper portion of the device main body 11.
  • the power supply unit 22 includes a power supply terminal base 24.
  • a reflection plate 25 which is a resin optical member, is mounted directly below the LED unit 18.
  • a lens element can also be adopted as an optical member in place of the reflection plate 25.
  • the reflection plate 25 has a plurality of reflection surfaces 26 each having a substantially semispherical shape and opened in a top portion in positions corresponding individually to the LED chips 19 of the LED unit 18.
  • the reflection plate 25 has an outer frame 27 on an outer circumferential portion thereof, and a translucent or transparent resin panel 28 is accommodated inside of the outer frame 27.
  • the reflection plate 25 is fixed to the device main body 11 via an endless annular packing 29 and an annular pressing plate 30.
  • the packing 29 accommodates the panel 28.
  • the frame member 12 has an auxiliary reflection plate 31 having a substantially semispherical shape and opened in a top portion on an inner circumferential surface thereof.
  • the device main body 11 has a plurality of projecting accommodating portions 32 on an outer circumferential portion of the cylindrical portion 13 in positions which are located circumferentially at equal intervals.
  • the device main body 11 has a reflection plate mounting surface 33 on an inner circumferential portion of the cylindrical portion 13 and has screw holes 34 in the reflection plate mounting surface 33 at bottom portions of the projecting portion accommodating portions 32.
  • the device main body 11 has, on a bottom surface thereof, an LED mounting surface 35 and has a spring mounting surface 37 to which an LED circuit board pressing spring 36 is fixed on an outer circumferential portion of the LED mounting surface 35, and a plurality of screw holes 38 are formed in the spring mounting surface 37.
  • the device main body 11 has a plurality of positioning projections 39 which are formed into small projections on an outer circumferential portion of the spring mounting surface 37 so as to position the LED circuit board pressing spring 36.
  • the plurality of LED circuit boards 20 of the LED unit 18 are disposed on the LED mounting surface 35 of the device main body 11.
  • the plurality of LED circuit boards 20 are radially arranged, and the plurality of LED circuit boards 20 are recessed onto the LED mounting surface 35 of the device main body 11.
  • the LED circuit board pressing spring 36 is disposed on the plurality of LED circuit boards 20 which are recessed onto the LED mounting surface 35.
  • the LED circuit board pressing spring 36 has an annular spring main body 40 which is thin and which has an elastic repulsive force and a plurality of pressing pieces 41 which each have a substantially curvilinear triangular shape so as to project toward an inner circumferential portion of the spring main body 40.
  • each pressing piece 41 has a pair of proximal LED circuit board pressing portions 42 at both side portions of a side of the pressing piece 41 which faces the spring main body 40 and a single distal LED circuit board pressing portion 43 at a distal end portion of the pressing piece 41.
  • the LED circuit board pressing spring 36 has notches 44 in an outer circumferential portion of the spring main body 40 in positions which coincide with the screw holes 38 in the spring mounting surface 37 of the device main body 11 and has notches 45 in positions which coincide with the positioning projections 39 of the device main body 11.
  • the LED circuit board pressing spring 36 is mounted on an upper portion of the LED unit 18.
  • the LED circuit board pressing spring 36 is positioned in the device main body 11 by the notches 45 being fitted on the corresponding positioning projections 39 of the device main body 11.
  • the notches 44 coincide with the screw holes 38 in the spring mounting surface 37 of the device main body 11, and screws 46 are screwed into the screw holes 38.
  • the distal LED circuit board pressing portions 43 of the pressing pieces 41 press the adjacent LED circuit boards 20 to the device main body 11.
  • the pairs of proximal LED circuit board pressing portions 42 and the distal LED circuit board pressing portions 43 of the LED circuit board pressing spring 36 press a plurality of positions of the adjacent LED circuit boards 20, and therefore, stress from the LED circuit board pressing spring 36 to the LED circuit boards 20 is dispersed.
  • the plurality of LED circuit boards 20 can be pressed and supported stably in the device main body 11.
  • the LED circuit boards 20 which constitute a main heat source can be heat connected to the device main body 11 which constitutes a heat dissipating medium in an ensured fashion.
  • the reflection plate 25 is disposed on the upper portion of the LED unit 18.
  • the reflection plate 25 has a plurality of projecting portions 47 corresponding to the projecting portion accommodating portions 32 of the device main body 11 on an outer circumferential portion of the outer frame 27 in positions which are spaced circumferentially at equal intervals, and screw holes 48 are provided individually in the projecting portions 47.
  • the reflection plate 25 is assembled inside the cylindrical portion 13 of the device main body 11 so that the projecting portions 47 are accommodated individually in the corresponding projecting portion accommodating portions 32 of the device main body 11.
  • the reflection plate 25 includes pressing projecting portions 49 which are provided between the reflection surfaces 26 on a rear surface thereof so as to press the pressing pieces 41 of the LED circuit board pressing spring 36 to the device main body 11.
  • the reflection plate 25 is recessed onto the reflection mounting surface 33 of the device main body 11.
  • the projecting portions 47 are inserted individually into the corresponding projecting portion accommodating portions 32 of the device main body 11, whereby the outer frame 27 is assembled onto the reflection plate mounting surface 33 of the device main body 11.
  • the packing 29 and the panel 28 which is mounted in the packing 29 are assembled onto an upper portion of the reflection plate 25.
  • the projecting portions 47 are inserted individually into the corresponding projecting portion accommodating portions 32 of the device main body 11, whereby the reflection plate 25 is positioned in place.
  • the pressing plate 30 is disposed on an upper portion of the packing 29.
  • screws 51 are inserted into the screw holes 48 in the projecting portions 47 of the reflection plate 25 from screw holes 51 provided in an outer circumferential portion of the pressing plate 30. Then, the screws 51 are screwed into the screw holes 34 through the screw holes 51.
  • the pressing projecting portions 49 on the reflection plate 25 press the pressing pieces 41 of the LED circuit board pressing spring 36 by the pressing plate 30 being screwed to the device main body 11.
  • the LED circuit boards 20 can be supported stably by virtue of an elastic restoration force which is accumulated in the pressing pieces 41 (refer to Figs. 4 , 5 ) of the LED circuit board pressing spring 36.
  • the LED circuit boards 20 are pressed to the device main body 11 by virtue of the elastic restoration force accumulated in the pressing pieces 41 (refer to Figs. 4 , 5 ) of the LED circuit board pressing spring 36.
  • the pairs of proximal LED circuit board pressing portions 42 and the distal LED circuit board pressing portions 43 of the pressing pieces 41 press the plurality of LED circuit boards 20 so as to press LED circuit boards 20 adjacent to each other together.
  • the LED circuit board pressing spring 36 has a function to support the LED circuit boards 20 on the device main body 11 and a function to press the adjacent LED circuit boards 20 together.
  • a gap dimension L1 is provided between the device main body 11 and the reflection plate 25.
  • the pressing projecting portions 49 of the reflection plate 25 press the pressing pieces 41 of the LED circuit board pressing spring 36 within a range of the gap dimension L1.
  • the pressing stress to the LED circuit boards 20 can be optimized, and the LED circuit boards 20 can be mounted in the device main body 11 in an ensured fashion.
  • the lighting device 10 of the embodiment according to the invention since the LED circuit boards 20 are supported in the device main body 11 by the LED circuit board pressing spring 36, although in the related-art lighting device, the stress applied to the LED circuit boards by virtue of the tightening torque of the screws needs to be taken into consideration, according to the lighting device 10 of the invention, the stress does not have to be taken into consideration.
  • the assembling performance can be improved.
  • the LED circuit boards are supported by the reflection plate, according to the lighting device 10, the LED circuit boards are not supported by the reflection plate.
  • the lighting device 10 since the inexpensive resin LED circuit boards 20 can be adopted, the lighting device 10 is advantageous in terms of costs.
  • the LED circuit boards are supported by the reflection plate, according to the lighting device 10, the LED circuit boards are not supported by the reflection plate, and therefore, high heat resistant properties do not have to be required on the resin reflection plate 25 in order to increase the heat resistant properties of the reflection plate to deal with LED units 18 of higher outputs.
  • the pairs of proximal LED circuit board pressing portions 42 and the distal LED circuit pressing portions 43 of the pressing pieces 41 press the plurality of adjacent LED circuit boards 20 together.
  • the pressing projecting portions 49 of the reflection plate 25 press the pressing pieces 41 of the LED circuit board pressing spring 36.
  • the pressing stress applied to the LED circuit boards 20 can be optimized, thereby making it possible to mount the LED circuit boards 20 in the device main body 11 in an ensured fashion.
  • the LED circuit board pressing spring 36 has integrally the function to support the LED circuit boards 20 on the device main body 11 and the function to press the adjacent LED circuit boards 20 together.
  • the assembling work involves only the mounting of the single LED circuit board pressing spring 36, thereby making it possible to reduce largely the number of man-hours by the simple assembling work.
  • the pressing projecting portions 49 of the reflection plate 25 press the pressing pieces 41 of the LED circuit board pressing spring 36 by the pressing plate 30 being screwed to the device main body 11.
  • the LED circuit boards 20 can be supported stably by virtue of the elastic restoration force accumulated in the pressing pieces 41 of the LED circuit board pressing spring 36.
  • the pairs of proximal LED circuit board pressing portions 42 and the distal LED circuit board pressing portions 43 of the LED circuit board pressing spring 36 press a plurality of positions of the adjacent LED circuit boards 20.
  • the stress from the LED circuit board pressing spring 36 to the LED circuit boards 20 is dispersed.
  • the plurality of LED circuit boards 20 can be pressed to be supported stably in the device main body 11.
  • the LED circuit boards 20 which constitute the main heat source can be heat connected to the device main body 11 which constitutes the heat dissipating medium in an ensured fashion.
  • the device main body, the frame members, the LED unit, the power supply unit and the mounting springs are not limited to the embodiment and hence can be modified or improved as required.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Led Device Packages (AREA)
EP12792328.2A 2011-05-31 2012-05-31 Beleuchtungsvorrichtung Active EP2716968B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011122301A JP5838331B2 (ja) 2011-05-31 2011-05-31 照明器具
PCT/JP2012/003611 WO2012164953A1 (ja) 2011-05-31 2012-05-31 照明器具

Publications (3)

Publication Number Publication Date
EP2716968A1 true EP2716968A1 (de) 2014-04-09
EP2716968A4 EP2716968A4 (de) 2014-10-01
EP2716968B1 EP2716968B1 (de) 2017-01-04

Family

ID=47258822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12792328.2A Active EP2716968B1 (de) 2011-05-31 2012-05-31 Beleuchtungsvorrichtung

Country Status (5)

Country Link
US (1) US9188319B2 (de)
EP (1) EP2716968B1 (de)
JP (1) JP5838331B2 (de)
CN (1) CN103562628B (de)
WO (1) WO2012164953A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024170322A1 (en) * 2023-02-13 2024-08-22 Signify Holding B.V. Luminaire assembly and clamping element for luminaire assembly

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8568001B2 (en) * 2012-02-03 2013-10-29 Tyco Electronics Corporation LED socket assembly
JP6115859B2 (ja) * 2013-03-11 2017-04-19 パナソニックＩｐマネジメント株式会社 照明用光源および照明装置
JP6264546B2 (ja) * 2014-02-18 2018-01-24 東芝ライテック株式会社 ランプ装置および照明装置
JP6336778B2 (ja) * 2014-02-27 2018-06-06 三菱電機株式会社 照明器具
JP7042782B2 (ja) * 2019-10-01 2022-03-28 三菱電機株式会社 光源ユニット及び照明器具

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WO2007128070A1 (en) * 2006-05-10 2007-11-15 Spa Electrics Pty Ltd Assembly including a fastening device
FR2922295A1 (fr) * 2007-10-12 2009-04-17 In Novea Sarl Module d'eclairage comportant plusieurs diodes electroluminescentes et ensemble d'eclairage comprenant un tel module
WO2010146914A1 (ja) * 2009-06-15 2010-12-23 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置

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Publication number Priority date Publication date Assignee Title
WO2007128070A1 (en) * 2006-05-10 2007-11-15 Spa Electrics Pty Ltd Assembly including a fastening device
FR2922295A1 (fr) * 2007-10-12 2009-04-17 In Novea Sarl Module d'eclairage comportant plusieurs diodes electroluminescentes et ensemble d'eclairage comprenant un tel module
WO2010146914A1 (ja) * 2009-06-15 2010-12-23 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置

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Publication number Priority date Publication date Assignee Title
WO2024170322A1 (en) * 2023-02-13 2024-08-22 Signify Holding B.V. Luminaire assembly and clamping element for luminaire assembly

Also Published As

Publication number Publication date
EP2716968A4 (de) 2014-10-01
JP5838331B2 (ja) 2016-01-06
CN103562628A (zh) 2014-02-05
JP2012252788A (ja) 2012-12-20
WO2012164953A1 (ja) 2012-12-06
CN103562628B (zh) 2016-08-17
EP2716968B1 (de) 2017-01-04
US20140078734A1 (en) 2014-03-20
US9188319B2 (en) 2015-11-17

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